Lamp.



G. K. MALTBY.

LAMP.

APPLICATION men NOV. I5, 1916.

Patented Aug. 20, 1918* chosen n. answer, or new roan, n. "r.

L a v Specification of Letters Patent.- .P tented Aug. 20 191.8.

Application filed November 16, 1918.. Serial No. 131,650.

To all whom it may concern:

Be it known that I, Gnoncn K. MALrBr, a citizen of the United States, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Lamps, of which the following is a full, clear, and complete disclosure.

My invention relates to lamps provided with reflectors adapted to concentrate rays of light from a common source on a plurality of points or areas, and is animprovement on the lamp described in my pending application Serial No. 78,584..

The objects and advantages of my improved lamp will readily be understood from a description of the preferred embodiment shown in the accompanying drawing.

Referring to the drawing, Figure 1 shows the complete lamp, the reflector beingshown in section; Fig. 2 is a plan view taken on the line 2-2 of Fig. 1, a portion of the upper reflector being broken away; Fig. 3 shows the arrangement for supporting the lamp from the ceiling; Fig. l is a detail view and shows the adjustable means for supporting the reflector elements.

Referring in detail to the structure shown, the lamp comprises an upper bowl-shaped reflector member 1 disposed over and spaced from lower bowl-shaped reflector member 2. The upper member is made oi a plurality of separate sections 3 which overlap at their edges and which may be secured to each other by the screw members i disposed in slots 5. These sections 3 each rest on and are secured to the swinging arms 6 which are pivoted at their inner ends by the screw '4' to the ring 8. The screw 7 permits the to be raised and lowered and to be held in any desired adjustment. The member 2 is also formed of separate sections 10 and these overlap at their edges and are held in position by the arms 11 hinged at their inner end to the rin 12 and supported i by the extensible arms 13. The sections 10 are secured to each other when in operative adjustment by the thumb screws 14.

A source or light shown in the form of an incandescent lamp 15 is disposed between the two reflector members and a plurality of partition members 16 are also disposed between the bowl-shaped reflectors and extend outwardly from the source or light. They are hinged at their inner ends to the rods 30, and their outer ends may be ad juste horizontally by loosening the thumb screws 17 disposed in the slots 18, and which engage the outer ends of the partition members at 31. These partition members form in connection with the bowl-shaped members 1 and 2 radial passage ways or conduits 19 which operate to direct the light rays from the source to a lur'ality of points surrounding the lamp. lhe concentrated beams of light issuing from these conduits may be adjusted horizontally by shifting the partition members as above described, and a vertical adjustment ofsuch beams may be had by loosening the screws l, 7, and 33, the latter controlling the length of the arm 13, and raisin the reflector elements and partition mem ers forming a part of the conduit or conduits to be adjusted.

For general illumination the lamp is provided with a cap 20 adjustably supported by thumb screws 21 and a portion of the light rays may pass out through the opening 22 or under the edges of the cap ati28.

The lamp has a support 24 to which the" reflector is adjustably secured by thumb screws 25 and 25 lin Fig. 3 the structure is the same as that above described, except that the bowl-shaped reflector members are not made in sections and are not adjustable, and the lamp is supported from the top by a bracket 26.

The advantages of my improved lamp are obvious. It may be used to great advantage,

for example, in libraries or factories where it is desired to concentrate light from a single source onto a'plurality oi pi'ecesof work or objects.

illumination is desired. .When so used, the light rays are thrown against the ceiling at such an angle that no appreciable part of the rays will be reflected back into the bowl. its use in many other ways will be obvious to those familiar with its construction and advantages.

It is obvious that many changes may-be made in the device without departing from it may also be inverted and used to advantage as a ceiling light where indirect 2. In iievice of the kind described in eombinetien, tWe eutwerdiy and (invin- Weiciiy inclined eefieetors memiteti VB?- ticei adjustment, and retiiei partition mere tiers disposetl between said reflectors and mounted, to? ejustment respect te 330-4512 at vertieai and e herizeiitel plane,

3. In device of tee kind. ciesciibed in combination,- e pair at otitwerdiy and dawn- "weidiyiiieiined reflectors stiperimpeseci eneever the other e116. speeetiepert, s smiiee e' light located Teetween said fiGCiSOIS, seiti reflectors eempi ising everi i sing sheets pivoted at their adjustment t @i he miter ends thereof intermediate seid IEEQC'LOZS, and SUjDS'iIZLl'la eeititioii' in intermeeiiupper ends to permlt flector cemprising two bOWi-ShQPGCiIEfiGCtOl' lembers superimposed one ever the other and spaced apart, source 0f ilght disposed between said members, e plurality 0i pertitien members dispeseci between the said reflectei members, and means for adjusting the Wt entis of said partition members, for e'purpese EiQSCiibEd. 

